Experimental device and method for measuring pipe wall stress and frictional resistance coefficients

Abstract

The invention discloses an experimental device for measuring pipe wall stress and frictional resistance coefficients. The experimental device comprises an air compressor, a first air bottle, a pressurizing pump, a plurality of pressure transmitters, a plurality of air storage branches, a plurality of high pressure horizontal pipelines, a plurality of biaxial strain rosettes, a plurality of differential pressure transducers, a plurality of pressure guide pipelines, a strain gauge, a data acquisition module, a computer, a plurality of elbows, a plurality of high pressure vertical pipelines, a second air bottle and a plurality of pressure returners. The invention further discloses an experimental method for measuring the pipe wall stress and frictional resistance coefficients by using the experimental device for measuring the pipe wall stress and frictional resistance coefficients. According to the method, the pipe wall stress and frictional resistance coefficients are measured according to data detected by the pressure transmitters, the differential pressure transducers and the strain gauge, and a guarantee is supplied to safe transportation of the petroleum industry.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploitation, and in particular relates to an experimental device and method for measuring pipe wall stress and frictional resistance coefficient. Background technique [0002] At present, with the rapid development of the national economy, many oil and gas pipelines widely distributed across the country have hidden dangers. The General Office of the State Council and various provinces and cities have attached great importance to it, and have issued rectification documents for oil and gas pipeline safety hazards. During the transportation of oil and gas, the fluid under pressure flows through the pipeline, which will deform the pipeline to a certain extent and cause stress concentration, resulting in long-term fatigue damage to the pipeline, which is not conducive to the long-term safe use of the pipeline. Therefore, measuring the stress or strain of the pipe wall when the fluid ...

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Problems solved by technology

[0003] In recent years, new technologies for measuring pipeline stress have gradually emerged, but they have not considered the measurement of pipeline stress under certain restrained vibration conditions and bound non-vibration conditions, and have not effectively simulated actual working conditions, and the existing Most of the equipment is aimed at the measurement of the frictional resistance coefficient and stress of horizontal pipelines, and the relevant measurement of vertical pipelines has not been realized.

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